Main Entry: ²guarantee

Function: transitive verb

Inflected Form(s): guaranteed; guarantee·ing

Date: 1731

1 : to undertake to answer for the debt, default, or miscarriage of <guarantee a loan>
2 : to engage for the existence, permanence, or nature of : undertake to do or secure <guarantee the winning of three tricks>
3 : to give security to <guaranteed her against loss>
4 : to assert confidently <I guarantee you'll like it>